It might be affected by the limitations of the speaker of the equipment you’re trying to listen with. If the speaker can’t transmit the frequency, you’re certainly not going to hear it.
Edit: After a disappointing initial test result, I wanted to check this for myself. I have just tried different ways of hearing this test….firstly on my iPad; the built in speaker, a pair of plug in earphones, then a pair of Bluetooth earphones (the latter are official Apple items).
I also tried the plug in earphones into my desktop PC, followed by the plug in stereo speaker (a Sony unit).
They all produced quite different results!
I was more pleased to discover that my best result (the PC and the Sony speaker) shows that my high tone perception is as good as someone 25 years younger than myself, which ties in with my last aircrew medical.
Last edited by ShyTorque; 27th November 2023 at 14:08.